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2.11 Developing Fuels

Biofuels ­ alternative fuels derived from renewable materials

Ethanol

Can be made by fermentation of carbohydrate crops (e.g. sugar cane)
Too volatile to be the sole fuel source
Up to 15% used
Said to be carbon neutral as plant CO2
intake = CO2
produced in combustion

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Fuel cells ­ turn chemical energy from oxidation reactions into electrical energy

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